Telephone system



(No Model.)

W. A JAOKSON 8v W. R. COLE.

TELEPHONE SYSTEM.

Patented Jan.6,1885.

N. PETERS. Pimxwuuwgmpmr. washington, D. Q

Cn i

UniTn STaTns TILLIAM A. JACKSON AND -VILLIAM ATTNT Orricn.

R. COLE, OF DETROIT, MICHIGAN, AS-

TELEPHONE SYSTEM.

SPECIFICATION forming part of Letters Patent No. 310,282, dated January 6, 1885.

Application filed March 5, lSSl. (No model.)

all whom t may concern,.-

Beit known that we, WILLIAM A. Jackson and XVILLLTM It. CoLn, of Detroit, in the county of Iayne and State of Michigan, have invented new and useful Improvements in Telephone Systems; and we do hereby declare that the following isa full, clear, and exact description thereof, relerence being` had to the accompanying drawings, which form a partof ic this specification.

This invention relates to new and useful improvements in automatic telephone-exchange switches; and the invention consists in thearrangement, construction, and combination of i5 the different parts, all as hereinafter set forlh,

and pointed out in the claims.

In most telephone-exchange systems each operator has, for the proper performance ol" his work, three different circuits at his dispo- 2o sition: iirst, his individual telephone circuit; second, a battery or test circuit, and, third, a generator-circuit. To prevent a multiplicity of wires, one circuit is often made to include part of one or two other circuits, and the use of interlocking switches then becomes necessary; but as the order of operating these switches is generally the same in every case of connection, we have contrived a mechanically-impellcd device by means of which, at the proper moment, all these switches are automatically operated in their order and for the necessary time interval, said device being also adapted to restore all the switches simultaneously to their normal position.

In the drawings which accompany this specification, Figure l is a perspective view of our mechanically-impelled switch. Fig. 2 is a cross-section thereof.

A is a grooved wheel, secured upon the shaft B, which is journaled in proper bearings of the supporting-frame rIhe wheel A consists of the metallic disks D D and the intervening rubber or other insulating disk, E.

F, G, H, I, and J are a series of insulated sections of the disks D and D', respectively. They form the movable contact-pieces of the switch.

L and L are two contact-springs bearing against the faces of the disks D D', respectively. They form the stationary contact-pieces of the switch.

M N O are three circular metallic disks secured upon the shalt B, and insulated therefrom.

I It are three spring-contacts for the disks 5j i M N O, respectively. Y

S is a gear-wheel sleeved upon the shaft B, and provided with a pawl, c.

T is a ratchet-wheel secured upon the shaft B.

` ,l is a pinion secured upon the counter- 6o shaft Z).-

V is an escape-wheel, and c is its governor.

\V is a wheel secured upon the counter-shaft b, and provided with the shoulder d upon its face. 6 5

X is an electro-magnet. t' is its armature, which is pivoted to a standard, e, and terminates at the forward end into a catch, f, adapted to engage with the sh oulder d ofthe wheel IV.

f/ is a coil-spring adapted to hold the arma- 7o ture t' normally open.

Y is a weight secured by a cord, 7L, to the wheel A between its disks D D'.

Z is a handle by means of which the wheel A may be rotated.

The insulated section II of disk D is connected by a wire, 1.1, to the disk O. The insulated section G of disk D is connected by a wire, Z, to disk N, and the section .I of disk D is connected by a wire, m, to the disk M. One end 8o ofthe coil of the electro-magnetX is connected to the contact-spring R, and its other end is connected to the test-battery circuit. The contactspring Q may be connected with the generatorcircuit, and the cont-act-springl? with the oper- S5 ators telephone-circuit. The contact-springs L and L may represent normally-disconnected terminals for the' subscribers7 lines. Normally the switch is in the position shown in the drawings, with the contacts for the telephone 9o and test circuits closed, and the operator is at liberty, as far as the condition oi the switch is concerned, to establish his telephone and test circuits on the switch-board; but as soon as the test-circuit is closed by the operator the electro-magnet X becomes excited, and, attracting its armature, releases the catch j from its engagement with the shoulder d of the wheel W, allowing the wheel A to revolve. The revolution of the disk D first breaks the ioo contacts L H, then successively makes and breaks the contacts L G and .L F until the spring L comes in contact with the solid part of the disk D, when the wheel A is arrested by a new engagement of the shoulder l with the catch f. rlhe revolution of the disk D irst breaks the contacts L' J, then makes and breaks the contacts L l', and then, after inaking the contact L' D', it stops. lVhen the revolution of the the wheel A has stopped, the handle Z is in the position shown in dotted lines, and the switch may now be easily restored by the operator to its normal position.

.i Vvlhile we have above and in a general Vway only indicated and described the use ot' the insulated segment-contacts H, G, and J, we have, in a parallel application for an improvement in telephone-exchange system and apparatus therefor, also shown how the insulated sections F ll may be used in connection with other apparatus to give another signal, and also how the contacts ofthe springs L L with the solid part of the disks D D' may be used to connect the subscribers7 lines. rlhe precise arrangement and number of the insulated contacts and their connection with the different electrical circuits also depend upon the kind of telephone-exchange system to which our switch is applied; but the arrangement shown in the drawings may be easily changed to suit different requirements.

lVhat we claim as our invention is l. A mechanically impelled telephoneswitch haring stationary contact-springs and movable segmentcontacts electrically insulated and forming a part ot' a rotary disk or disks, said connections forming a part'of a series of independent circuits, in combination with an electro-magnet included in one circuit of the series and a clock-work acted on by said electro-magnet to eitect its release, to impart a uniform motion to the switch to successively make and break each circuit in the series, substantially in the manner described.

2. In a mechanically-impelled telephoneswitch, the combination of the revolving wheel A, carrying a series of insulated segment-contacts,with the insulated disks M N O, contact-springs l Q R, bearing on said insulated disks, and the wires 7c Z fa, for electrically connectingl the said insulated segments with the insulated disks, substantially as and for the purpose described.

3. ln a telephone-switch including a series of independent circuits, the combination of the mechanically-impelled wheel A, forming apart oi" said circuits and its regulating` clockwork, the detent-wheel NV, provided with shoulder d, and the electro-magnet X, included in one of said circuits, and provided with an armature, i, arranged to contact with the shoulder d of said detent-wheel, whereby a single momentary exciting of the electro-magnet disconnects the armature and shoulder d and permits the entire revolution of the wheel XV, to successively make and break the remaining circuits of the series, substantially as and for the purposes herein set forth.

4. In a telephone-switch, the combination ot' the metal disks D D', having electrically disconnected segmental. sections which form the movable contact-pieces of the switch, with the insulating-disk E and the stationary contact-springs L L', substantially as and for the purpose described.

The combination of a mechanically-inipclled telephoneswitch,D D', carrying insulated segmental sections forming the terminals of a series ot' circuits, and stationary contactsprings L L', forming the other terminals oi'a series ot' circuits, with a regulating clockwork and an electro-magnet located in and farming a part of one circuit of the series,and constructed and arranged to automatically release' said clock-work and permit the escapewheel thereof to make an entire revolution, to compel said segmental sections to successively contact with the springs 'L L', to make and break each circuit ot' the series successively, substantially as and for the purposes speciiied.

WILLIAM A. JACKSON. WILLIAH R. COLE.

XVitiiesses:

H. S. SPRAGUE, E. ScULLY. 

